Veneered tubing



Jan. 12, 1937. w. HOLT 2,067,665

VENEERED TUBING Filed March 6, 1936 W BY M ATTORNEYS Patented Jan. 121, 1937 PATENT OFFIE VENEERED TUBING of Delaware Application March 6, 1936, Serial No. 67,515

4 Claims.

This invention has for its object a tube to be used primarily for hand rails, hand holds, uprights or posts, in situations where non-corrosive or non-rustable tubes with a polished outer surface are desirable, which tube is especially economical in construction, seamless in appearance and made of a body or base of relatively cheap metal and an outer veneer of non-corrosive or non-rustable metal, as stainless steel, which will keep a polish or luster, and particularly a tube in which the veneer strip or the margins thereof are joined together by a lock seam joint within the base.

This tube is for the same general purpose and the same general nature as that of co-pending application of Thomas W. Holt and John F. Lev-an, Serial Number 19,267, filed May 1, 1935. It differs therefrom in that the margins of the veneer strip are interlocked with a lock seam joint located within the base tube and also in that the welding operation may be omitted or may be used. if desired.

Another feature of this invention is that the edges of the veneer strip are locked together with a lock seam joint located entirely within the metal base tube in contradistinction to being located or partly located in the slit of-the base tube.

The invention consists in the novel features and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawing in which like characters designate corresponding parts in all the views.

Figure 1 is an enlarged isometric view of a tube embodying this invention.

Figure 2 is an end view of the finished tube if the welding operation is employed.

This tube consists of a base or body of comparatively cheap metal, as sheet steel, formed to have a slit extending lengthwise thereof, and a veneer of polished, non-corrosive or non-rustable metal having its margins folded through the slit of the base tube and locked together with a lock seam joint.

I designates the metal base tube; and 2, the veneer strip. The margins of the veneer strip are folded around the edges 3, 4 of the base adjacent the slit 5 and extend into the interior of the base tube I, where they are joined together by a lock seam joint 6.

More specifically, one margin of the veneer strip is folded through the slit and then in the form of a loop, the opposite side portions of which lap the inner faces of the base tube I on opposite sides of the slit 5, and the other margin of the veneer tube is extended through the slit 5 and has an angular flange '1 extending between the walls of one side portion of the loop. When the loop is flattened, a lock seam joint is formed. The parts of the lock seam joint may be, if desired, welded together and also to the margins of the base tube l as shown in Figure 2 or at W in Figure 1. If welded, the tube is smoothed to remove the roughness left by the welding operation. Also, the portions of the veneer strip located in the slit are welded together and to the edges of the base tube I. The tube is, however, complete without the welding.

The tube may be formed up from flat blanks.

The method constitutes the subject matter of another application.

What I claim is:

1. A tube construction comprising a body or a base formed with a slit extending lengthwise thereof, a veneer strip enclosing the base and having its margins extending around the edges of the base at the slit into the interior of the base and joined together with a lock seam joint located within the interior of the base strip, extending on opposite sides of said slit and engaging fiatwise the inner faces of said margins.

2. A tube construction comprising a body or base formed with a slit extending lengthwise thereof, a veneer strip enclosing the base and having its margins extending around the edges of the base at the slit, one of the margins of the veneer strip being extended around the adjacent edge of the base and into the interior of the base and being in the form of a flattened loop, the opposite side portions of which lap the inner faces of the base adjacent the slit, and the other margin of the veneer strip extending through the slit and being folded and interlocked in said loop forming a lock seam joint within the base.

3. A tube construction comprising a body or base formed with a slit extending lengthwise thereof, a veneer strip enclosing the base and having its margins extending around the edges of the base at the slit, one of the margins of the veneer strip being extended around the adjacent edge of the base and into the interior of the base and being in the form of a flattened loop, the opposite side portions of which lap the inner faces of the base adjacent the slit, and the other margin of the veneer strip extending through the slit and being folded and interlocked in said loop forming a lock seam joint within the base, the portions of the veneer strip forming the lock seam and joined together with a lock seam joint located within the interior of the base strip, extending on opposite sides of said slit and engaging fiatwise the inner faces of said margins, the lock seam joint and the portions of the margins extending 5 through the slit being integrally united to each other and to the margins of the base strip.

THOMAS W. HOLT. 

